Hybrid Ferromagnet/Semiconductor Nanodots and Nanowires

技术上的。该项目致力于在制备半导体和铁磁体的新型纳米点和纳米线阵列方面取得新的理解和进展。该方法包括使用多孔氧化铝模板的多步骤工艺，目前正在研究精确控制纳米颗粒及其在新型纳米阵列制造中的应用。与基于分子束外延生长的III-V半导体和Heusler合金的垂直异质结构铁磁/半导体纳米器件的合成和加工现象将被追求。利用Au催化的气-液-固(VLS)生长，通过分子束外延(MBE)获得了GaAs纳米线，并将在该项目中进一步研究，以生长由铁磁性(例如，MnAs)和半导体材料组成的混合纳米线阵列。将利用广泛的实验工具和专业知识进行系统研究，旨在更基本地了解纳米结构材料和设备的电、磁和光学特性。非技术性。该项目涉及具有技术相关性的电子/光子材料科学专题领域的基础研究问题。这项研究有可能对非易失性存储器和纳米线电子电路等新型电子设备的发展产生重大影响。开发新的纳米结构甚至可以为新的设备设计打开大门，这是以前从未考虑过的。对年轻人进行电子、磁性和光学纳米结构领域的教育和培训--这些领域对今后在信息技术中的应用至关重要--对这一项目至关重要。除了在科学和工程的不同方面对学生进行培训外，该项目还通过在东北大学已建立的项目中开展活动，结合现有的针对K-12学生、女性和代表性不足群体的教育，并由这些PI积极参与。四到八名本科生将通过东北大学独特的合作项目为研究做出贡献，高中生将参与暑期研究项目。

Technical. This project addresses new understanding and progress in fabricating novel nanodot and nanowire arrays of semiconductors and ferromagnets. The approach involves a multi-step process using porous alumina templates, and is being studied for precise control of nanopatterns and its use in fabrication of novel nanoarrays. Synthesis and processing phenomena associated with the fabrication of vertically heterostructured, ferromagnet/semiconductor nanodevices based on MBE-grown III-V semiconductors and Heusler alloys will be pursued. Nanowires of GaAs have been achieved via MBE using Au-catalyzed vapor-liquid-solid (VLS) growth and will be further studied on this project for growing arrays of hybrid nanowires composed of ferromagnetic (e.g., MnAs) and semiconducting materials. A wide range of experimental tools and expertise will be utilized for systematic investigations aimed at gaining greater fundamental understanding of electrical, magnetic, and optical properties of nanostructured materials and devices. Non-Technical. The project addresses fundamental research issues in a topical area of electronic/photonic materials science having technological relevance. There is potential that the research could substantially impact the development of novel electronic devices such as nonvolatile memories and nanowire electronic circuits. Development of novel nanostructures could even open doors to new device designs never before contemplated. Educating and training young people in the areas of electronic, magnetic and optical nanostructures--areas which are crucial for future applications in information technology is of primary importance to this project. In addition to training students in diverse aspects of science and engineering, this project couples with existing educational outreach to K-12 students, women, and underrepresented groups through activities in programs already established at Northeastern University with active participation by these PIs. Four to eight undergraduates will contribute to the research through Northeastern's unique Co-op program, and high school students will be involved in summer research programs.